Finding the Fourth Proportional to 83,788.54, 115,683.85 and 64,372.86

Step by Step Solution

1. Step 1: Write the proportion equation
   83,788.54 : 115,683.85 = 64,372.86 : x
2. Step 2: Convert to fraction form
   83,788.54/115,683.85 = 64,372.86/x
3. Step 3: Cross multiply
   83,788.54x = 115,683.85 × 64,372.86
4. Step 4: Simplify right side
   83,788.54x = 7,446,900,280.31
5. Step 5: Solve for x
   x = 7,446,900,280.31/83,788.54
6. Step 6: Final answer
   x = 88,877.31